118results about How to "Consistent shrinkage" patented technology

The invention discloses an aluminum oxide ceramic substrate with high heat conductivity. The aluminum oxide ceramic substrate is prepared by steps of stirring a ceramic powder material, a binder, a plasticizer, a dispersant and a solvent uniformly, preparing a ceramic raw-ceramic substrate through a tape casting method, glue discharging and sintering. The aluminum oxide ceramic substrate is characterized in that the solvent is a mixture of butanol, isopropanol and butyl acetate, and the ceramic powder material comprises aluminium oxide powder and auxiliary agents. The invention also discloses a preparation method for the aluminum oxide ceramic substrate with the high heat conductivity. According to the aluminum oxide ceramic substrate and the preparation method, the solvent system which comprises the butanol, the isopropanol and the butyl acetate are used as the main solvent in place of traditional toluene, thus enhancing dissolution of PVB by the solvent, thereby guaranteeing uniformity of raw ceramic slurry, making physical properties of sintered ceramic stable, reducing environmental influences of the exhausted gas during production processes compared to traditional modes of production, contributing to energy conservation and emission reduction, and reducing the cost.

A method for making jeans. A material is weaved for use as a front portion of the jeans. The warp portion of the weave is spun with a combination of open-end and ring spinning. The weft portion of the weave is spun with open-end spinning. The resulting weaved material is then sulfur dyed, singed and pre-shrunk to form the front portion. Another material is weaved for use as a back portion of the jeans using a fabric composition which is 79% cotton, 20% filament fiber polyester, 1% spandex. The warp portion of the weave is spun using a combination of open-end and ring spinning. The weft portion of the weave is made from the filament fiber polyester. The resulting fabric composition weaved material is then indigo dyed and singed and then pre-shrunk to form the back portion. The two portions are cut and sewed together to produce the jeans.

A process for preparing molybdenum part with high size precision and compactness includes preparing adhesive from paraffin wax, high-density polyethene, polypropene and stearic acid through proportionally mixing, mixing it with molybdenum powder, injection moulding, degreasing, presintering, sintering, holding the temp for 1-10 hr, and post treating.

The invention belongs to the field of oral materials, in particular relates to a sintering process for rapidly preparing a zirconia ceramic block with uniform strength and color transition, and in particular relates to a high-toughness zirconia ceramic block, and the powder formula of the zirconia ceramic block comprises 1.5 to 12% of yttrium oxide, 0 to 2.5% of silicon carbide nano whiskers, 0 to1.5% of a coloring matter and the balance of zirconium oxide according to the mass fraction. Based on the ceramic block, the multilayer zirconia ceramic block with uniform transition of comprehensivemechanical properties, color and permeability is provided. At the same time, a process capable of completing the sintering of the zirconia ceramic block with high efficiency and high quality is provided. By using the process, the zirconia ceramic block with excellent comprehensive mechanical properties and uniform color and permeability transition can be obtained in as short a time as possible.

The invention belongs to the field of oral cavity materials and particularly relates to a layered zirconia porcelain block technology with even contraction of all layers. By adopting the technical scheme, according to the required colors, the component and content of zirconia powder formulas of all the layers are determined, and zirconia porcelain blocks of all the layers comprise shallowest layers, transition layers and deepest layers; according to the content of yttria in all the formulas, the particle diameter distribution of zirconia and yttria in the shallowest layers and the deepest layers is adjusted, so that it is guaranteed that the contraction rate diversity factor of the shallowest layers and the deepest layers after sintering is smaller than 0.3%; the adjusted shallowest layersand deepest layers are evenly mixed to obtain the transition layers; the shallowest layers, transition layers and deepest layers are placed layer by layer according to the color shade sequence and subjected to isostatic pressing, pre-sintering and high-temperature sintering, and preparation is completed. By adopting the technical scheme, the layered zirconia porcelain block with natural colors, natural penetrability transition and a basically-constant contraction rate can be obtained.

The invention discloses a manufacturing method of a lightweight partition wall. The method comprises the steps of arranging a die; mixing and agitating; arranging a plurality of layers of reinforcing nets in the die; arranging a plurality of through pipe fittings in the direction vertical to the reinforcing nets, wherein the spacing is reserved between pipe fittings, and the pipe fittings are symmetrically arranged in proportion; grouting and processing; leveling the raw materials at a raw material inlet of the die; dismounting the die; drawing out the pipe fittings; solidifying and drying inner cores for 2 to 3 hours; pressing cement fibrolite boards and cutting; adhering the pressed and cut cement fibrolite boards on the surface plates on two surfaces of the inner cores; adhering and bearing the inner cores and the cement fibrolite boards; respectively arranging matched spliced protecting sleeves on two mutually-spliced side surfaces of the inner cores; standing to dry and maintaining. The lightweight partition wall can be produced by mass and mounted in places as requirement; the lightweight partition wall is fast and convenient to mount, and high in construction efficiency.

A multifunctional shirt with ironing-free, water-proof, oil-proof, anti-fouling, refreshing and hydroscopic functions features that its front pieces are made of the ironing-free, water proof, oil-proof and antifouling fabric, its back pieces are made of the ironing-free, refreshing and hydroscopic fabric, and its sleeves and collar are made of the ironing-free, water-proof and oil-proof fabric cleaned easily. Its making method includes such steps as providing said fabrics, adding resin, stacking, water washing, respectively adding proper assistants, stretching, baking, pre-shrinking, and sewing.

The invention discloses a support-matched large component powder injection molding method. The method comprises the following steps that a, metal powder and a binder are mixed uniformly and then prepared into feed particles; b, an injection molding machine is utilized for injecting the feed particles into a mold to form a blank; c, a support matched with the shape of the blank is pressed and molded, and a separation coating is brushed on the surface of the support; and d, after the blank is put on the surface of the support, the blank and the support are put in a sintering furnace together for degreasing and sintering, and sintering is completed to obtain a finished product. In the sintering step in the injection molding process, the blank is put on the support, the separation coating is brushed between the blank and the support, feed parameters and molding parameters are adjusted, then the blank and the support are sintered together, and it is guaranteed that the shrinking rates of the blank, the separation coating and the support during sintering are consistent; and meanwhile, the blank, the separation coating and the support are combined closely, the shapes are matched, no clearance exists between the blank, the separation coating and the support, no crack is generated to the blank during sintering, and the percent of pass and quality of the finished product are effectively improved.

The invention provides a thin silicon rubber and fabric composite product and a mold pressing vulcanizing forming process thereof. The thickness of the product is smaller than or equal to 1.2 mm. The mold pressing vulcanizing forming process comprises the following steps that (1) fabric degreasing is conducted; (2) surface treatment is conducted; (3) rubber cement preparation is conducted; (4) rubber coating is conducted; (5) silicon rubber preforming is conducted; (6) compositing is conducted, specifically, fabric is placed between two pieces of preformed silicon rubber, pressed and cut into a clover-shaped wafer with the corresponding diameter size; (7) mold preheating is conducted; (8) vulcanizing is conducted, specifically, a mold core is coated with the clover-shaped rubber wafer, and mold assembling, pressurizing and vulcanizing are conducted; (9) after being taken out from a vulcanizing machine, a mold is cooled; and (10) the product is taken out from a mold cavity and subjected to post vulcanizing for 4 h. According to the mold pressing vulcanizing forming process of the thin silicon rubber and fabric composite product, the silicon rubber and the fabric are subjected to mold pressing vulcanizing forming and are firmly connected, and the fabric is uniformly placed between the inner-layer silicon rubber and the outer-layer silicon rubber; demolding is conducted through cooling, the shrinkage rate of the silicon rubber is consistent with that of the fabric, and the product is strict in size control, not deformed and good in sealing performance; and the situation that the fabric is exposed and eccentric is avoided.

The invention relates to the field of part preparation in a composite material production technology, and particularly discloses a preparation method for a gradient nozzle. The method comprises the steps that metal powder and ceramic reinforced particles are uniformly mixed according to the design of the gradient nozzle so as to prepare 2-15 kinds of composite powder with different ceramic contents, the powder is subjected to high-energy ball mill mechanical alloying, gel solutions are added into the composite powder separately, the gel solutions and the composite powder are uniformly stirred to form composite material slurry with the good fluidity, then curing agents are sequentially added into the multiple kinds of slurry from outside to inside, the multiple kinds of slurry with the curing agents are sequentially poured into a vertical type centrifugal forming machine rotating at a high speed, and after curing is finished, demolding, drying and vacuum sintering are carried out so as to prepare the gradient nozzle, wherein the number of the gradient layers of the nozzle can reach more than 10, and the thickness of one single sintered layer is 0.3mm-10mm. The method has the advantages that the process is simple, the energy consumption is low, the composite material gradient nozzle with the large height-diameter ratio can be prepared, and the thermal stability and the erosion-abrasion resistance of the nozzle can be improved.

The invention discloses a composite ceramic tile with a smooth glaze. The composite ceramic tile comprises a first blank, an adhesive layer, a second blank and a glaze layer which are arranged from bottom to top in sequence, wherein the first blank is adhered to the second blank through the adhesive layer; the first blank is made of a powder material through pressing; the powder material is made through dry-method powdering; the second blank is made of a powder material through pressing; the latter powder material is made through wet-method powdering. A manufacturing method of the composite ceramic tile with the smooth glaze comprises the following steps: (1) manufacturing the first blank; (2) manufacturing the second blank; (3) manufacturing a composite blank; (4) performing glazing; (5)sintering the composite ceramic tile with the smooth glaze. As the blanks of two powder materials are compounded, the glaze is positioned on the surface of the blank made through wet-method powdering,and not only is the ceramic tile with the smooth and flat glaze made, but also the cost of the ceramic tile can be reduced.

The present invention provides an aluminium nitride ceramic compnoent with high heat conductivity and high size accuracy and its preparation method. Said method includes the following steps: uniformly mixing aluminium nitride AlN powder and yttrium oxide Y2O3 powder according to mixing ratio of 90-98:2:10, adding binding agent, mixing them into uniform feeding material, the volume ratio of powder in the feeding material is 54-68%, injection moulding, injection temperature is 120-170 deg.C and injection pressure is 80-140 MPa, after the injected blank body is grease-removed and presintered, sintering in the flowing nitrogen gas atmosphere in the sintering furnace with 1700-2000 deg.C, heat-insulating for 1-10 hr, so as to obtain the aluminium nitride ceramic component.

The invention discloses a construction method for spraying the wall surface of a building with machine-made sand aggregate dry-mixed mortar, which comprises the following steps: wall surface base treatment; construction preparation; spraying construction; surface layer spraying; finishing; The dry-mixed mortar is stirred into a slurry, and the spraying machine sprays the mixed mortar slurry onto the base layer immediately. The whole process takes about 8 seconds from stirring to spraying; the process is completed by scraping when the mortar consistency is at its best and the workability is at its best; The thickness of 15mm is sprayed at one time; the spraying thickness of the surface layer is controlled to be consistent (about 8-10mm), and the shrinkage of the surface layer is kept consistent; the leveling and finishing processes are done before the final setting of the mortar; the problem of shortage of natural sand resources is effectively solved; the machine-made sand The efficiency of aggregate mortar spraying is 2 to 3 times higher than that of manual painting; machine-made sand mortar spraying finishes have excellent properties such as anti-cracking, no hollowing, no peeling, and high bonding strength; it overcomes the limitations of plastering in the prior art Common quality problems, improve the overall quality of architectural decoration.

The invention discloses a stacking machine capable of being stably operated to realize rapid transportation. The stacking machine comprises a hoisting mechanism and a stacking disc matched with the hoisting mechanism, wherein the hoisting mechanism comprises a movable hanging frame, a hoisting mechanism and a driving mechanism which is arranged on a movable hanging frame transverse beam to drive the hoisting mechanism to move leftward and rightward; the driving mechanism is provided with four first hoisting wheels which are connected with second hoisting wheels arranged at four corners of the upper end face of a hoisting bottom frame of the hoisting mechanism; rotary locking mechanisms are arranged at left and right ends of the upper end face of the hoisting bottom frame along an edge of the hoisting bottom frame; the stacking disc is provided with a locking part for fixing the rotary locking mechanisms; the rotary locking mechanisms are controlled to rotate through retraction of a retraction device and then are tightly locked with or separated from the locking part. The stacking machine provided by the invention has a simple structure and the stacking disc is firmly fixed; the stress on the hoisting mechanism is uniform, and the hoisting mechanism is horizontally hoisted; the stacking machine is stable and does not swing in a transportation process; when the stacking disc is placed, the whole stacking is ordered, an occupied space is reduced and the stacking is safer; the working efficiency is greatly improved.

The invention discloses a magnetron cathode assembly and silicon-molybdenum solder integrated preparation method, and the method is characterized by comprising the following steps: (1) selecting materials and performing proportioning; (2) performing grinding and uniform mixing; (3) performing screening; (4) preparing an organic carrier; (5) preparing silicon-molybdenum solder slurry; (6) performing coating; (7) performing presintering; (8) performing high-temperature sintering; (9) performing welding. The preparation method is simple in production process, low in cost and easy to realize automation.